说明：  为了程序可读、易理解、好维护，你的程序需要遵守一定的规范，你的程序需要设计。 “程序必须为阅读它的人而编写，只是顺便用于机器执行。”
(In order to be readable, easy to understand and easy to maintain, your program needs to comply with certain specifications, and your program needs to be designed. "The program must be written for those who read it, just for machine execution by the way.")